If you haven't read the posthumous profile of David Foster Wallace in the New Yorker, you must. It is so beautiful and touching, and it really captures just how crazy-making it can be like to be a writer. I was scared to see how much I related and empathized to his struggles.
My favorite line of the article:
“Fiction’s about what it is to be a fucking human being,” he once said. Good writing should help readers to “become less alone inside.”
That's exactly why I read--and write.